Sheryl Sandberg releases book about overcoming loss

The book, she said in a Facebook post, is about resilience in the wake of hardships.

"Because no one's life is perfect, we all live some form of Option B. It's my deepest hope that Option B will help others learn what I learned: that when life pulls you under, you can kick against the bottom, break the surface, and breathe again."

Why it matters: Like her first book "Lean In," her new book is sure to be the topic of conversation in Silicon Valley circles. "Have you read 'Option B'?" will be a go-to ice breaker for a while.